Réponses

2013-03-06T13:54:18+01:00
2013-03-06T13:58:48+01:00

2 (x² + 5x - 10)         2x² + 10x - 20

--------------------  = -----------------------

         x²                               x²

 

                            =  (x - 5)(x +5)

                                        x²